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Preparation method of superhydrophobic superparamagnetic silicone resin composite coating

A composite material and silicone resin technology, applied in coatings, magnetic coatings, etc., can solve problems such as poor adhesion, poor weather resistance of polymers, and easy particle agglomeration to achieve extended service life, good mechanical properties, and improved dispersion. and compatibility effects

Active Publication Date: 2015-06-10
HANGZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] To solve the current Fe 3 o 4 The polymer superhydrophobic composite material has problems such as poor weather resistance, easy agglomeration of particles, and poor cohesive force. The present invention provides a method for preparing a superhydrophobic superparamagnetic silicone resin composite coating. The preparation process of the present invention is simple, and the composite material The service life is extended, so that the material has good mechanical properties, the adhesion reaches level 1, and it also has electromagnetic shielding properties

Method used

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  • Preparation method of superhydrophobic superparamagnetic silicone resin composite coating
  • Preparation method of superhydrophobic superparamagnetic silicone resin composite coating
  • Preparation method of superhydrophobic superparamagnetic silicone resin composite coating

Examples

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Effect test

Embodiment 1

[0032] (1) Preparation of modified Fe 3 o 4 particle

[0033] In parts by mass, 50 parts of nano-Fe 3 o 4 , 40 parts of ammonia water and 300 parts of water are added to the reaction kettle with a stirring paddle, stirred at a speed of 500 rpm for 30 minutes, the temperature of the water bath is slowly raised to 80°C, and 30 parts of ethyl orthosilicate is added within 4 hours After the slow addition, add 25 parts of methacryloxypropyltrimethoxysilane slowly within 4 hours, keep stirring for 6 hours after the dropwise addition is completed, then separate the prepared solution under an external magnetic field, remove the upper layer, The particles in the lower layer were alternately washed with absolute ethanol and distilled water for 5 times, and then dried in a blast drying oven at 60°C for 48 hours to obtain modified Fe 3 o 4 particle.

[0034](2) Preparation of superhydrophobic superparamagnetic silicone resin composites

[0035] 80 parts of modified Fe 3 o 4 Parti...

Embodiment 2

[0038] (1) Preparation of modified Fe 3 o 4 particle

[0039] In parts by mass, 40 parts of nano-Fe 3 o 4 , 35 parts of potassium hydroxide and 250 parts of water were added to the reaction kettle with a stirring paddle, stirred at a speed of 450 rpm for 45 minutes, and the temperature of the water bath was slowly raised to 70°C, and 25 parts of ethyl orthosilicate was added to the After adding slowly within 2.5 hours, add 15 parts of tridecafluorooctyltrimethoxysilane slowly within 3 hours, keep stirring for 4 hours after the dropwise addition is completed, then separate the prepared solution under an external magnetic field, and remove the upper layer , the lower particles were alternately washed with absolute ethanol and distilled water for 4 times, and then dried in a blast drying oven at 50°C for 35 hours to obtain modified Fe 3 o 4 particle.

[0040] (2) Preparation of superhydrophobic superparamagnetic silicone resin composites

[0041] 60 parts of modified Fe 3...

Embodiment 3

[0044] (1) Preparation of modified Fe 3 o 4 particle

[0045] In parts by mass, 30 parts of nano-Fe 3 o 4 , 30 parts of sodium hydroxide and 200 parts of water are added to the reaction kettle with a stirring paddle, stirred at a speed of 300 rpm for 60 minutes, the temperature of the water bath is slowly raised to 75 °C, and 20 parts of ethyl orthosilicate After slowly adding within 3 hours, slowly add 20 parts of hexadecyltrimethoxysilane within 3.5 hours, keep stirring for 3 hours after the dropwise addition, and then separate the prepared solution under an external magnetic field, remove the upper layer, The particles in the lower layer were alternately washed with absolute ethanol and distilled water for 3 times, and then dried in a blast drying oven at 55°C for 24 hours to obtain modified Fe 3 o 4 particle.

[0046] (2) Preparation of superhydrophobic superparamagnetic silicone resin composites

[0047] 50 parts of modified Fe 3 o 4 Particles, 30 parts of methyl...

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Abstract

The invention relates to the technical field of silicone resin composites, aims at solving the problems of poor weathering resistance, easy particle agglomeration, poor adhesion and the like of an existing Fe3O4 polymer superhydrophobic composite and provides a preparation method of a superhydrophobic superparamagnetic silicone resin composite coating. The preparation method comprises the following steps: coating the surfaces of Fe3O4 particles with SiO2, further modifying the Fe3O4 particles with a silane coupling agent, then dispersing the modified Fe3O4 particles, silicone resin and a dispersant to form a composite solution, and finally dip-coating or spin-coating the composite solution on a substrate and drying to prepare a superhydrophobic superparamagnetic silicone resin composite. The preparation process disclosed by the invention is simple, the service life of the composite is prolonged, the material has good mechanical properties, the adhesion achieves level 1 and the electromagnetic shielding performance is simultaneously realized.

Description

technical field [0001] The invention relates to the technical field of silicone resin composite materials, in particular to a preparation method of a superhydrophobic superparamagnetic silicone resin composite coating. Background technique [0002] A superhydrophobic surface refers to a surface with a contact angle with water greater than 150° and a rolling angle less than 10°. Super-hydrophobic surfaces have long existed in nature. Many plant surfaces have super-hydrophobic surfaces and self-cleaning effects. The typical representative is the lotus leaf effect. A large number of studies have shown that the surface of the lotus leaf has an uneven and rough microstructure, which makes it super-hydrophobic. At present, there are two main ways to prepare superhydrophobic surfaces: one is to construct a rough structure on the surface of hydrophobic materials with low surface energy, and materials with low surface energy to prepare superhydrophobic materials include modified sil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/04C09D183/07C09D183/05C09D7/12C09D5/23
Inventor 裴勇兵韩庆雨吴连斌汤龙程赵丽陈利民蒋剑雄
Owner HANGZHOU NORMAL UNIVERSITY
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